Whistle Training Tapes
Kent
Kuykendall
Gaining the Winning Edge With Whistles CD
a sample from Kent's CD can be found here
order from Border Collies in Action
Alasdair
MacRae
Whistle While You Work Audio Tape
order from Border Collies in Action
Hubert
Bailey
Stock Dog Whistle Commands CD
order from Border Collies in Action